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Simples Nacional calculator 2026: DAS, band and effective rate by annex (I to V)

From the revenue of the last 12 months to the DAS of the month: band, nominal rate, amount to deduct and effective rate for annexes I to V, with the fator R.

Free, no sign-up to use · what you type or add stays on your device · works offline · How it works

What do you want to calculate?
R$
R$
Annex of the activity

Simples Nacional calculation

DAS of the month

R$ 2,020.00

Effective rate 8.08% · band 2 of annex III

Effective rate
8.08%
Nominal rate
11.20%
Amount to deduct
R$ 9,360.00
  1. 1up to R$ 180,000.006%—
  2. 2up to R$ 360,000.0011.2%− R$ 9,360.00
  3. 3up to R$ 720,000.0013.5%− R$ 17,640.00
  4. 4up to R$ 1,800,000.0016%− R$ 35,640.00
  5. 5up to R$ 3,600,000.0021%− R$ 125,640.00
  6. 6up to R$ 4,800,000.0033%− R$ 648,000.00

Effective rate = (RBT12 × nominal rate − amount to deduct) ÷ RBT12, annexes of LC 123/2006 as rewritten by LC 155/2016. In the first months of a company the RBT12 is the average revenue times 12. Not a substitute for an accountant.

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About this tool

Type the gross revenue of the last 12 months (RBT12), this month's revenue and the annex of the activity: I trade, II industry, III and V services, IV construction, cleaning, security and law firms. The calculator finds the band, applies the formula of LC 123/2006 (RBT12 × nominal rate − amount to deduct, divided by RBT12) and shows the effective rate and the DAS of the month. For the services that depend on the fator R, type the payroll of 12 months: 28% or more of revenue puts the activity in annex III, otherwise in annex V. Above R$ 3.6 million ICMS or ISS leave the DAS, and above R$ 4.8 million the company leaves the Simples.

How to use it

  1. 1 Type the revenue of the last 12 months and the revenue of this month.
  2. 2 Choose the annex of the activity.
  3. 3 If your service depends on the fator R, tick the box and type the payroll of 12 months.
  4. 4 Read the DAS of the month, the effective rate and your band in the table.

Frequently asked questions

Are the values I type saved or sent anywhere?

No. Everything is worked out in your browser. Nothing goes to a server, nothing is saved and nothing stays in the page address; only the link you choose to copy carries the values.

What is the fator R?

For some services (LC 123/2006, art. 18 §5º-I and §5º-J), payroll of the last 12 months, with pró-labore, divided by revenue. At 28% or more the activity is taxed in annex III; below it, in the higher annex V.

And for a new company?

In the first months the RBT12 is the average monthly revenue so far times 12 (art. 18 §2º). Type that value.

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